When my bride refused to practice enough to become proficient with my Mossberg 500 20ga, I put it in the back window of my dumptruck...

I had an old single shot 12 with just enough barrel to keep legal overall length...

As I told her... "If push comes to shoot, just pull this hammer thingy back as you raise the gun and fire as soon as you see the person or animal down the top of the barrel..." Even then I wasn't confident in her ability to actually get a shot off with it. She did finally settle down and train on the pistols and rimfire rifles so she had better choices...